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77b0e2239a
u-boot-brain/arch/arm/include/asm
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Marek Vasut 77b0e2239a ARM: mxs: Setup stack in JTAG mode 
In case the MX23/MX28 is switched into JTAG mode via the BootMode select
switches, the BootROM bypasses the CPU core registers initialization.
This in turn means that the Stack Pointer (SP) register is not set as
it is in every other mode of operation, but instead is only zeroed out.

To prevent U-Boot SPL from crashing in this obscure JTAG mode, configure
the SP to point at the CONFIG_SYS_INIT_SP_ADDR if the SP is zeroed out.

Note that in case the SP is already configured, we must preserve that exact
SP value and must not modify it. This is important since in every other mode
but the JTAG mode, the SPL returns into the BootROM and BootROM in turn loads
U-Boot itself. If the SP were to be corrupted, the BootROM won't be able to
continue it's operation after returned from SPL and the system would crash.

Finally, add the JTAG mode switch identifier, so it's not recognised as
Unknown mode.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
2013-10-17 09:44:20 +02:00
..
arch-a320 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-am33xx ARM: IGEP0033: Update timing to run DDR at 400MHz. 2013-10-07 07:43:46 -04:00
arch-arm720t Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-armada100 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-armv7 Merge branch 'u-boot/master' into u-boot-arm/master 2013-07-25 17:57:46 +02:00
arch-at91 ARM: atmel: add RNDIS gadget support 2013-09-24 17:51:35 +02:00
arch-bcm2835 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-davinci Merge branch 'master' of git://88.191.163.10/u-boot-arm 2013-08-18 14:14:34 -04:00
arch-ep93xx Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-exynos Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
arch-imx mxc: Define architecture identifier 2012-09-01 14:58:30 +02:00
arch-ixp Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
arch-kirkwood Merge branch 'master' of git://git.denx.de/u-boot-i2c 2013-07-24 09:50:24 -04:00
arch-ks8695 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-lpc32xx Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-mb86r0x Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-mx5 usb: ehci-mx5: Use 'bool' instead of 'unsigned char' 2013-08-26 21:56:34 +02:00
arch-mx6 mx6: compute PLL PFD frequencies rather than using defines 2013-10-17 09:44:20 +02:00
arch-mx25 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-mx27 mx27: add missing constant for mx27 2013-09-10 19:12:55 +02:00
arch-mx31 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-mx35 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-mxs ARM: mxs: Setup stack in JTAG mode 2013-10-17 09:44:20 +02:00
arch-nomadik Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-omap3 Merge branch 'u-boot-ti/master' into 'u-boot-arm/master' 2013-09-04 14:06:56 +02:00
arch-omap4 ARM: omap4-panda: Add MAC address creation for panda 2013-10-14 16:06:53 -04:00
arch-omap5 omap5: add qspi support 2013-10-07 17:55:50 +05:30
arch-orion5x Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-pantheon Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-pxa Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-rmobile Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-s3c24x0 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-s5pc1xx arm:mmc:goni/exynos: Fix wrong mmc base register devices offset. 2013-09-11 10:52:10 +09:00
arch-sa1100 Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
arch-socfpga socfpga: Adding System Manager driver 2013-10-07 19:32:21 +02:00
arch-spear Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-tegra Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-tegra20 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-tegra30 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-tegra114 ARM: Tegra: USB: EHCI: Add support for Tegra30/Tegra114 2013-07-11 14:15:15 -07:00
arch-tnetv107x Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-u8500 Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
arch-vf610 Merge branch 'master' of git://git.denx.de/u-boot-i2c 2013-07-24 09:50:24 -04:00
arch-zynq Merge 'u-boot-microblaze/zynq' into (u-boot-arm/master' 2013-09-03 14:01:02 +02:00
imx-common dma: apbh: Add special circular mode for LCD 2013-08-09 21:48:34 +02:00
proc-armv Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
armv7.h ARM: extend non-secure switch to also go into HYP mode 2013-10-03 21:28:55 +02:00
assembler.h arm: Use optimized memcpy and memset from linux 2011-04-27 19:38:07 +02:00
atomic.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
bitops.h arm: add __ilog2 function 2011-07-16 13:00:11 +02:00
bootm.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
byteorder.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
cache.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
config.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
dma-mapping.h arm: dma_alloc_coherent: malloc() -> memalign() 2013-09-14 12:08:00 +02:00
ehci-omap.h ARM: OMAP5: USB: Add OMAP5 common USB EHCI information 2013-08-26 21:55:46 +02:00
emif.h ARM: DRA7xx: EMIF: Change settings required for EVM board 2013-06-10 08:43:10 -04:00
errno.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
gic.h ARM: add SMP support for non-secure switch 2013-10-03 21:28:51 +02:00
global_data.h ARM: use r9 for gd 2013-09-23 18:00:02 +02:00
gpio.h gpio: Replace ARM gpio.h with the common API in include/asm-generic 2012-01-09 20:10:32 -06:00
hardware.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
io.h ARM: fix write*() I/O accessors 2011-02-21 08:30:55 +01:00
linkage.h arm: adapt asm/linkage.h from Linux 2012-05-15 08:31:26 +02:00
mach-types.h arm: Remove support for smdk6400 2013-04-12 07:55:08 +02:00
macro.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
memory.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
omap_boot.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
omap_common.h omap5: add qspi support 2013-10-07 17:55:50 +05:30
omap_gpio.h SPDX-License-Identifier: fixing some problematic GPL-2.0 files 2013-08-19 15:34:13 -04:00
omap_gpmc.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
omap_mmc.h omap_hsmmc: add driver check for write protection 2013-03-08 16:41:13 -05:00
omap_musb.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
pl310.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
posix_types.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
processor.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
ptrace.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
sections.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
setup.h arm bootm: Allow to pass board specified atags 2012-10-30 15:28:05 -07:00
sizes.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
spl.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
string.h arm: Use optimized memcpy and memset from linux 2011-04-27 19:38:07 +02:00
system.h ARM: mmu: Set domain permissions to client access 2013-03-28 09:10:58 +01:00
types.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
u-boot-arm.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
u-boot.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
unaligned.h Move architecture-specific includes to arch/$ARCH/include/asm 2010-04-13 09:13:12 +02:00
utils.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00